Welcome to the Atmel AVR Assembler. This manual describes the usage of the Assem-bler. The Assembler covers the whole range of microcontrollers in the AT90S family. The Assembler translates assembly source code into object code. The generated objectcode can be used as input to a simulator or an emulator such as the Atmel AVR In-Cir-cuit Emulator. The Assembler also generates a PROMable code and an optionalEEPROM file which can be programmed directly into the program memory andEEPROM memory of an AVR microcontroller.The Assembler generates fixed code allocations, consequently no linking is necessary.The Assembler runs under Microsoft Windows 3.11, Microsoft Windows95 andMicrosoft Windows NT. In addition, there is an MS-DOS command line version. TheWindows version of the program contains an on-line help function covering most of thisdocument.The instruction set of the AVR family of microcontrollers is only briefly described, refer tothe AVR Data Book (also available on CD-ROM) in orde...